Steam-engine



v(Nb Model) DQC. GIVENS. y STEAM ENGINE. V l A :Na 501,829. PatentedJuly 18,1893.

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f@ AMOR/V57@ UNITED STATES PATENT OFFICE.

DVIGHT C. GIVENS, OF REGER, MISSOURI.

STEAM-ENGINE.

SIPECIFIGATION forming part of Letters Patent No. 501,829, dated J' uly18, 1893.

Application led February 14, 1893- Serial No.462,318. (No model.)

To wll'whom it may can/cern:

Be it known that I, DWIGHT C. GIVENs, a citizen of the United States,and a resident of Reger, in the county ot Sullivan and State ofMissouri, have invented certain new and usef-ul Improvements inSteam-Engines; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enableothersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis specificaion.

My invention relates to improvements in rotary engines, the object beingto provide a simple and economical construction of the same, which shallbe very efficient in use.

The invention consists in the novel construction and combination ofparts, hereinafter fully described and claimed.

In the accompanying drawings: Figure 1 is an elevation of a rotary steamengine, constructed in accordance with my invention. Fig. 2 is alongitudinal section of the same. Fig. 3 is a central cross section,"and Fig. 4 is a front or face view of the back-plate of the engine, withits integral grooves or steamchannels.

Like numerals of reference denote corresponding parts in all thefigures.

In the said drawings, the reference numeral 1 designates tworectangulary plates, each provided with a central aperture for thepassage of the driving-shaft 2. Each of these plates is formed with anannular semicircular groove 3, concentric with the central apertures,and when the plates are placed face to face and bolted together, anannular cylindrical steam space is formed. These grooves also form twocentral hubs 4, having their faces cutaway, so that when the plates arebolted together, there will be a space left between the hubs to receivea disk 5, fast to the drivingshaft. This disk is provided with aperipheral piston 6, which corresponds with andY Works in the annularsteam chamber.

The plates or heads 1, at their upper sides, are formed with rectangularrecesses 7, communicating with the steam chamber, and forming a chamberto receive the vertically reciprocating abutment 8, consisting of arectangular block provided with a rod or stem 9, passing through anaperture in the top part 10. This rod is connected to a bracket 12,formed with or secured to a vertical arm 13, of the vertically movableyoke 14. This yoke is provided with a cam-groove on its face, and isalso provided at its upper side or portion with a web 15, in which isformed a cam groove 16, so constructed that when the antifriction roller17, journaled on a stud 18 on the crank 19, secured to the driving-shaftand rotating therewith, engages with the groove 16, the yoke, andconsequently the abutment 8, will be raised and lowered. At its lowerside, the yoke is provided with an arm 20. Both the arms 13 and 2O workin brackets 21, which serve as guides therefor.

The numeral 23a designates the steam-chest,- the under side of whichforms a guide-plate, 23, for the slide-valve 28. Steam from the boilerenters the steam-chest through a port on one side of the chest, as shownin dotted lines at 23". Theslide-valve 28 works in the narrow spacebetween the under side of the apertured guide-plate 23 and the flatheads, or top part, of` the face-plates 1 and 1;. said plates beingprovided with inlet and exhaustports 26 and 26", and 27 and 27a, onopposite sides of the central abutment 8, and registering withcorresponding ports 24 and 24a, and 25 and 25a, in the stationaryguide-plate 23, which forms the bottom of the steam-chamber or steamchest 23a. The intermediate flat valve-plate 28 is also provided withapertures, viz: on one side, 29 and 29 (adapted to register with ports26 and 26 in the face-plates 1 and 1,and 24 and 24a in the guide-plate23); and, on the other side, valve-plate 28 has apertures 30 and 3()a(similarly adapted to register with ports 27 and 27a in the contiguousface-plates, and 25 and 25a in the stationary guide-plate), so thatcommunication between the steam-chest and engine proper may be cut off,opened, and regulated by means of the slide-Valve 28. One end of thevalve 28 passes out through the end of the steam chest and is providedwith a pin 31,to which is connected a lever 32, pivoted to one of theheads 1. Diametrically opposite the abutment, the heads or plates 1 areformed with recesses 34, forming a valve chamber in which is located IOOtwo vertically movable valves 35, provided on their outer or oppositefaces with grooves 36 forming steam passages.

The casing 37 of the valves, is connected with the source of steamsupply, or with the steam-chest, by means of pipes 38, and the valvesare provided with stems 39, by which they may be actuated. These valvesare nor- Inally depressed or lowered to their fullest extent so thatthey Will not project up into the steam chamber thus allowing freepassage for the piston. The purpose of these valves will be hereinafterexplained.

From the foregoing description, taken in connection with the drawings,the operation of my improved rotary engine will be readily understood.Supposing the operative parts to be in the position illustrated in Fig.2, steam will enter the circular steam-chamber, 3, on the left-hand sideof piston 6, through the registering ports 24a, 29 and 26a. Thesteam-pressure impels the piston to the righthand side, thus revolvingdisk 5 and with it the central drive-shaft 2, the crank 19 of which(with its anti-friction roller 17) also revolves. Now, by the timeroller 17 reaches and enters the cam-groove at the upper end of yoke 14,

the piston will have reached (on its circular travel) the abutment fromwhich it started, and as this is raised or lifted by the yoke 14 withits arm 13, bracket 12 and depending rod 9, it permits the piston topass by and the steam confined in the circular chamber 3 to 32, theinlet and exhaust-ports will be rev, versed, and the motion of thepiston will be reversed accordingly and run in the opposite direction.

In case the engine should stop on the dead center, it can be readilythrown off the same, by raising or elevating one of the valves V35allowing the steam to enter the steam chamber through the groove in theside, and the valve acting as an abutment, the steam will strike thepiston, and move it past the center. The valve is then lowered, and theoperation will go on as rst above described.

Having thus described my invention, what I claim iS- The combination, ina rotary steam-engine, with the revolving piston, of the startingvalves35, having steam-passages 36 and located in a valve-chamber, 34:,diametrically opposite the main abutment valve 8, and steam-pipes 38,whereby the engine may be thrown off a dead center, substantially as setforth.

In testimony that I claim the foregoing as my own I have hereuntoaiiixed my signature in presence of two witnesses.

DWIGHT C. GIVENS. Witnesses:

F. E. Woon, W. B. HUGHES.

